DTC DETECTION LOGIC
This diagnosis detects leaks in the EVAP line between fuel tank and EVAP canister purge volume control solenoid valve, using the negative pressure caused by decrease of fuel temperature in the fuel tank after turning ignition switch OFF.
If ECM judges there are no leaks, the diagnosis will be OK.
DTC No. | Trouble diagnosis name | DTC detecting condition | Possible cause |
P0456 | EVAP VERY SML LEAK (Evaporative emission control system leak) |
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CAUTION:
DTC CONFIRMATION PROCEDURE
1.PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always perform the following before conducting the next test.
Do you have CONSULT?
YES >> GO TO 2.
NO >> GO TO 4.
2.PERFORM DTC CONFIRMATION PROCEDUREI
WITH CONSULT
NOTE: It will take at most 2 hours until "OFF" of "EVAP DIAG READY" changes to "ON".
NOTE: Never turn ignition switch ON during 90 minutes.
Which is displayed on CONSULT?
CMPLT>> GO TO 3.
YET >> Perform DTC CONFIRMATION PROCEDURE again. GO TO 1.
3.PERFORM DTC CONFIRMATION PROCEDUREII
Check 1st trip DTC.
Is 1st trip DTC detected?
YES >> Proceed toEC, "Diagnosis Procedure".
NO >> INSPECTION END.
4.PERFORM DTC CONFIRMATION PROCEDURE
WITH GST
NOTE: Never turn ignition switch ON during 90 minutes.
Is 1st trip DTC detected?
YES >> Proceed to EC, "Diagnosis Procedure".
NO >> INSPECTION END.
1.CHECK FUEL FILLER CAP DESIGN
Is the inspection result normal?
YES >> GO TO 2.
NO >> Replace with genuine NISSAN fuel filler cap.
2.CHECK FUEL FILLER CAP INSTALLATION
Check that the cap is tightened properly by rotating the cap clockwise.
Is the inspection result normal?
YES >> GO TO 3.
NO >> Open fuel filler cap, then clean cap and fuel filler neck threads using air blower. Then retighten until reteaching sound is heard.
3.CHECK FUEL FILLER CAP FUNCTION
Check for air releasing sound while opening the fuel filler cap.
Is the inspection result normal?
YES >> GO TO 5.
NO >> GO TO 4.
4.CHECK FUEL TANK VACUUM RELIEF VALVE
Refer to EC, "Component Inspection".
Is the inspection result normal?
YES >> GO TO 5.
NO >> Replace fuel filler cap with a genuine one.
5.CHECK FOR EVAP LEAK
Refer to EC, "Inspection".
Is there any leak in EVAP line?
YES >> Repair or replace.
NO >> GO TO 6.
6.CHECK EVAP CANISTER VENT CONTROL VALVE
Check the following.
Refer to FL, "Exploded View".
Refer to EC, "Component Inspection".
Is the inspection result normal?
YES >> GO TO 7.
NO >> Repair or replace EVAP canister vent control valve and Oring. Refer to FL, "Removal and Installation".
7.CHECK IF EVAP CANISTER SATURATED WITH WATER
Does water drain from EVAP canister?
YES >> GO TO 8.
NO1 >> With CONSULT: GO TO 10.
NO2 >> Without CONSULT: GO TO 11.
8.CHECK EVAP CANISTER
Weigh the EVAP canister assembly with the EVAP canister vent control valve and EVAP control system pressure sensor attached. Refer to FL, "Removal and Installation".
The weight should be less than 1.6 kg (3.5 lb).
Is the inspection result normal?
YES1 >> With CONSULT: GO TO 10.
YES2 >> Without CONSULT: GO TO 11.
NO >> GO TO 9.
9.DETECT MALFUNCTIONING PART
Check the following.
>> Repair hose or replace EVAP canister. Refer to FL, "Removal and Installation".
10.CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE OPERATION
With CONSULT
Vacuum should exist.
Is the inspection result normal?
YES >> GO TO 13.
NO >> GO TO 12.
11.CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE OPERATION
Without CONSULT
Vacuum should exist.
Is the inspection result normal?
YES >> GO TO 13.
NO >> GO TO 12.
12.CHECK VACUUM HOSE
Check vacuum hoses for clogging or disconnection. Refer to EM, "Exploded View".
Is the inspection result normal?
YES >> GO TO 13.
NO >> Repair or reconnect the hose.
13.CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
Check the EVAP canister purge volume control solenoid valve. Refer to EC, "Component Inspection".
Is the inspection result normal?
YES >> GO TO 14.
NO >> Replace EVAP canister purge volume control solenoid valve. Refer to EM, "Exploded View".
14.CHECK FUEL TANK TEMPERATURE SENSOR
Check the fuel tank temperature sensor. Refer to EC, "Component Inspection".
Is the inspection result normal?
YES >> GO TO 15.
NO >> Replace fuel level sensor unit. Refer to FL, "Removal and Installation".
15.CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR
Check the EVAP control system pressure sensor. Refer to FL, "Removal and Installation".
Is the inspection result normal?
YES >> GO TO 16.
NO >> Replace EVAP control system pressure sensor. Refer to FL, "Removal and Installation".
16.CHECK EVAP PURGE LINE
Check EVAP purge line (pipe, rubber tube, fuel tank and EVAP canister) for cracks or improper connection.
Refer to EC, "EVAPORATIVE EMISSION SYSTEM : System Description".
Is the inspection result normal?
YES >> GO TO 17.
NO >> Repair or reconnect the hose.
17.CLEAN EVAP PURGE LINE
Clean EVAP purge line (pipe and rubber tube) using air blower.
>> GO TO 18.
18.CHECK EVAP/ORVR LINE
Check EVAP/ORVR line between EVAP canister and fuel tank for clogging, kink, looseness and improper connection.
For location, refer to EC, "On Board Refueling Vapor Recovery (ORVR)".
Is the inspection result normal?
YES >> GO TO 19.
NO >> Repair or replace hoses and tubes.
19.CHECK RECIRCULATION LINE
Check recirculation line between fuel filler tube and fuel tank for clogging, kink, cracks, looseness and improper connection.
Is the inspection result normal?
YES >> GO TO 20.
NO >> Repair or replace hose, tube or fuel filler tube.
20.CHECK REFUELING EVAP VAPOR CUT VALVE
Check the refueling EVAP vapor cut valve. Refer to EC, "Component Inspection (Refueling EVAP vapor cut valve)".
Is the inspection result normal?
YES >> GO TO 21.
NO >> Replace refueling EVAP vapor cut valve with fuel tank. Refer to FL "Removal and Installation".
21.CHECK FUEL LEVEL SENSOR
Check the fuel level sensor. Refer to MWI, "Component Inspection" (TYPE A) or MWI, "Component Inspection" (TYPE B). Check the vehicle type to confirm the service information in MWI section. Refer to MWI, "Information".
Is the inspection result normal?
YES >> Check intermittent incident. Refer to GI, "Intermittent Incident".
NO >> Replace fuel level sensor unit. Refer to FL, "Removal and Installation".
1.CHECK FUEL FILLER CAP
Pressure: 15.3 20.0 kPa (0.156 0.204 kg/cm2, 2.22 2.90 psi)
Vacuum: −6.0 to −3.3 kPa (−0.061 to −0.034 kg/cm2,−0.87 to −0.48 psi)
Is the inspection result normal?
YES >> INSPECTION END
NO >> GO TO 2.
2.REPLACE FUEL FILLER CAP
Replace fuel filler cap.
CAUTION: Use only a genuine fuel filler cap as a replacement. If an incorrect fuel filler cap is used, the MIL may illuminate.
>> INSPECTION END
Transverse link
Exploded View
1. Front suspension member 2. Transverse link
Removal and Installation
REMOVAL
Remove the wheel and tire assembly using power tool. Refer to WT
"Adjustment".
Remove transverse link from steering knuckle. Refer to FAX "Exploded
View".
Remove tr ...
Key warning lamp
Component Function Check
1.CHECK FUNCTION
Select INTELLIGENT KEY of BCM using CONSULT.
Select INDICATOR in ACTIVE TEST mode.
Touch KEY IND or KEY ON to check that it works normally.
Is the inspection result normal?
YES >> Key warning lamp is OK.
NO >> Refer to DLK "Dia ...